"Hot on the heels of Ferrari, McLaren presented their 2010 car to the world on Friday, when the MP4-25 was unveiled at the UK headquarters of sponsors Vodafone. The team hope the new machine will maintain their strong momentum from the latter part of 2009 and put them firmly back in title contention.

With its dramatic looking engine-cover fin, the car will bear the prestigious number one, thanks to reigning world champion Jenson Button joining McLaren from the former Brawn team to partner fellow Briton - and 2008 champion - Lewis Hamilton.

“I’m incredibly proud to be standing here today knowing I’ll be carrying the number one for the whole season: that’s a great responsibility but also a great honour,” said Button. “It’s something I’m relishing. From the very first day of testing, I’ll be working with the team to learn about the car and to develop it ahead of the first race. I’ve said it before: the pace of development in those opening tests could well determine the outcome of the championship.”

The 2010 McLaren looks noticeably different from last year’s race-winning MP4-24. It features a radical aerodynamic overhaul and a significantly larger fuel tank to take full advantage of this year’s new regulations, and its design team is confident it has explored every possible avenue to maximise the car’s performance. Horsepower once again comes from a subtly improved Mercedes-Benz FO 108X V8 engine.

“I’ve seen just how much effort and attention has gone into making this car what it is,” commented Hamilton. “We’ve been pushing like crazy to find the performance and the result is something that looks very special and very uncompromising. Both Jenson and I are world champions, and we both want to add to the team’s incredible winning legacy.

“I think a strong driver line-up will be very important this year as there are a lot of very competitive teams and drivers - and the stronger we can be, the better chance we’ll have of winning races. We all understand that. Obviously, I want to win the drivers’ world championship, that’s clear. But, just as important, I want to help the team win the constructors’ world championship. I think it’s set to be a great year for Formula 1 - it should be brilliant.”

McLaren’s 2010 line-up marks the first time since 1989 - when the team ran Alain Prost and Ayrton Senna - that they have fielded a joint-world champion driver line-up, and marks the first time in Formula One history that the sport’s two most recent world champions have been partnered together.

Members of the design team who contributed to the development of MP4-25 can also trace their involvement back through seven of the team’s 12 drivers’ world championships, five of the team’s eight constructors’ world championships and 112 of the team’s 164 Grand Prix victories.

“At Vodafone McLaren Mercedes, we’ve demonstrated that strength in depth is the best approach to take in Formula One,” said team principal Martin Whitmarsh. “The group of engineers, designers and strategists we’ve assembled demonstrates how much can be achieved by a very focused team operating at the very limit of their abilities.

“In Jenson, we saw a champion driver hungry for more success. We’ve already seen those qualities in Lewis, too. I’m convinced that we have one of the very strongest driver line-ups in Formula One, and that both Jenson and Lewis are committed to working together to enhance the team’s prospects in what promises to be a fiercely competitive season.”

Like most of their rivals, McLaren begin pre-season testing at the Spain’s Valencia circuit on Monday."

Wasn't that kind of vertical fin was tested in 2008 by Renault and Force India???
I thought I've seen something similar couple years ago.....

yeah but those ones did not join to the rear wing...
This design by Mclaren has something to do with the placement of the cooling components which were moved to accomodate for the larger fuek tank while the Renault design was just a way to help aero stability

yeah but those ones did not join to the rear wing...
This design by Mclaren has something to do with the placement of the cooling components which were moved to accomodate for the larger fuek tank while the Renault design was just a way to help aero stability

In a sunny wind calm day this might help stability, but in windy days the car might become unstable when it encounter cross-wind. Like Silverstone 2008

Loved McLaren win the Finn's where driving. Hey the young Brit is pretty good too but Jensen being so old and has finally gotten his Championship mite as well go on home. Just wait, he will not do a thing this year! Please bring back the flying Finn: Mika!!!